Current File : //usr/lib/node_modules/pm2/node_modules/@opencensus/core/build/src/common/time-util.js
"use strict";
/**
* Copyright 2019, OpenCensus Authors
*
* Licensed under the Apache License, Version 2.0 the "License";
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const MILLIS_PER_SECOND = 1e3;
const NANOS_PER_MILLI = 1e3 * 1e3;
const NANOS_PER_SECOND = 1e3 * 1e3 * 1e3;
let hrtime = process.hrtime;
let hrtimeOrigin = [0, 0];
let hrtimeRefSeconds = 0;
let hrtimeRefNanos = 0;
function setHrtimeReference() {
resetHrtimeFunctionCache();
hrtimeOrigin = hrtime();
const refTime = Date.now();
hrtimeRefSeconds = Math.floor(refTime / MILLIS_PER_SECOND);
hrtimeRefNanos = (refTime % MILLIS_PER_SECOND) * NANOS_PER_MILLI;
}
/**
* This is used to enable tests to mock process.hrtime while still allow us to
* cache it.
*/
function resetHrtimeFunctionCache() {
hrtime = process.hrtime;
}
/**
* Gets the current timestamp with seconds and nanoseconds.
*
* @returns {Timestamp} The Timestamp.
*/
function getTimestampWithProcessHRTime() {
const [offsetSecs, offsetNanos] = hrtime(hrtimeOrigin);
// determine drift in seconds and nanoseconds
const seconds = hrtimeRefSeconds + offsetSecs;
const nanos = hrtimeRefNanos + offsetNanos;
if (nanos >= NANOS_PER_SECOND) {
return { seconds: seconds + 1, nanos: nanos % NANOS_PER_SECOND };
}
return { seconds, nanos };
}
exports.getTimestampWithProcessHRTime = getTimestampWithProcessHRTime;
/**
* Creates a new timestamp from the given milliseconds.
*
* @param {number} epochMilli the timestamp represented in milliseconds since
* epoch.
* @returns {Timestamp} new timestamp with specified fields.
*/
function timestampFromMillis(epochMilli) {
return {
seconds: Math.floor(epochMilli / MILLIS_PER_SECOND),
nanos: (epochMilli % MILLIS_PER_SECOND) * NANOS_PER_MILLI
};
}
exports.timestampFromMillis = timestampFromMillis;
setHrtimeReference();
exports.TEST_ONLY = {
setHrtimeReference,
resetHrtimeFunctionCache
};
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